The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2004
Filed:
Jun. 30, 2003
Applicant:
Inventors:
Hung C. Lin, Silver Spring, MD (US);
Chiang H. Yeh, Gaithersburg, MD (US);
Assignee:
Marylabd Semiconductor, Inc., Clarksburg, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 1/116 ;
U.S. Cl.
CPC ...
H03H 1/116 ;
Abstract
When two sine-wave signals in quadrature, the integral of the output is equal to zero. Conversely, when an in-phase signal is inputted as one multiplicand and the output is set to zero, a quadrature signal is derived from the second multiplicand automatically. Any analog multiplier can be used. Examples using differential pair and conductance multiplier have been demonstrated. The multiplier operates over a wideband, and the in phase and quadrature signals can be equalized automatically.